Sliver opening device for open-end spinning mechanism

ABSTRACT

The highspeed picking roller is driven by a friction drive wheel engageable with a belt having one end carried by a pulley on the highspeed picking roller shaft and the other end carried by an idler roller mounted on a lever to swing the idler roller and belt out of engagement with a friction drive wheel. The lowspeed sliver supply roller of the sliver-resolving mechanism for an individual spinning station is quickly disengageable from a common drive for a plurality of spinning stations by sliding a drive belt off a single-flange pulley. Alternatively, gear wheels on the supply roller shaft and the main drive shaft are connected by an intermediate idler gear having its axis offset from a line through the axes of the drive and driven gear wheels; and the intermediate gear wheel can be swung by a lever out of meshing engagement. Upon disengagement of at least the picking roller from its drive, a side of the resolving mechanism housing can be removed by loosening thumbscrews, and internal components mounted in tapered bores in the opposite housing wall can be pulled quickly from the housing. The entire housing is connected only to the machine frame and can be removed independently of the spinning chamber housing.

United States Patent 1191 Landwehrkamp et al.

[ Apr. 30, 1974 [75] Inventors: Hans Landwehrkamp, Gerolfmg;

' Karl Handschuch, Oberhaunstadt,

both of Germany [73] Assignee: Schubert & Seller Maschinenfabrik Aktiengesellschaft, Ingolstadt, Germany 22 Filed: Aug. 14, 1972 21 Appl. No.: 280,093

[30] Foreign Application Priority Data Aug. 14, 1971 Germany 2140820 [52] US. Cl 57/58.95, 57/83, 57/105, 74/221, 74/242.15 R [51] Int. Cl. D0lh 1/20, DOlh 1/12 [58] Field of Search 57/58.91, 58.95, 83, 86, 57/104, 105, 88; 74/221, 242.15 R, 242.6; 19/105, 106

[56] References Cited UNITED STATES PATENTS 3,626,681 12/1971 Naruse 57/58.95 x

1,406,933 2/ 1922 Cohn 74/221 1,297,787 3/1919 Brannon 74/242.6 1,309,474 7/1919 FirebeL. 74/242.6 3,648,450 3/1972 Prochazka et a1. 57/58.95 X 3,695,021

10/1972 Ormerod et al. 57/58.9l

Primary Examiner-John W. Huckert Assistant Examiner-Charles Gorenstein Attorney, Agent, or Firm-Robert W. Beach; Ms; R. M. Van Winkle ABSTRACT The highsp'eed picking roller is driven by a friction drive wheel engageable with a belt having one end carried by a pulley on the highspeed picking roller shaft and the other end carried by an idler roller mounted on a lever to swing the idler roller and belt out of engagement with a friction drive wheel. The lowspeed sliver supply roller of the sliver-resolving mechanism for an individual spinning station is quickly disengageable from a common drive for a plurality of spinning stations by sliding a drive belt off a single-flange pulley. Alternatively, gear wheels on the supply roller shaft and the main drive shaft are connected by an intermediate idler gear havingits axis offset from a line through the axes of the drive and driven gear wheels; and the intermediate gear wheel can be swung by a lever out of meshing engagement. Upon disengagement of at least the picking roller from its drive, a side of the resolving mechanism housing can be removed by loosening thumbscrews, and internal components mounted in tapered bores in the opposite housing wall can be pulled quickly from the housing. The entire housing is connected only to the machine frame and can be removed independently of the spinning chamber housing.

5 Claims, 5 Drawing Figures PATENTED 30 SHEU 2 [IF 3 This invention relates to a sliver-resolving device contained in a housing including a lowspeed sliver supply roller and a highspeed needle or picking roller.

Open end spinning machines having separate housings for the spinning turbine and the sliver-resolving mechanism of a spinning station in which the sliverresolving device can be disengaged from its drive independently of the spinning turbine are known and have been disclosed in German Offenlegungsschriften Nos. 1,535,005, 1,815,776 and 1,933,930. Such devices, however, are very elaborate; and, especially if the resolving device housing also forms the spinning chamber cover, require precision fitting to effectively realign cooperating parts of the resolving device and the spinning turbine or its housing. German Offenlegungschrift No. 2,050,064 discloses two eonjointly movable housing elements, one for the spinning turbine and the other for the sliver-resolving device, but this device requires precise guide means for maintaining or effecting accurate adjustment of cooperating parts and further requires a very elaborate drive mechanism. Such complicated construction of these prior devices renders accessibility to and exchange of components of the sliver-resolving mechanism extremely difficult and time consuming.

It is therefore a principal object of the present invention to provide sliver-resolving devices which can be stopped independently of each other, even though they have a common drive.

Another important object is to provide a sliverresolving device for a spinning machine which can be demounted from its station and replaced within the shortest possible time.

A further important object is to provide such a device in which component parts can be removed, cleaned and/or replaced quickly and easily.

These objects can be accomplished by driving the highspeed needle or picking rollers and, if desired, the lowspeed sliver supply rollers from a common drive shaft having a disk or sheave for each spinning station engageable with a belt carried by a pulley on an individual roller shaft. The individual drive disk engages the outer belt surface; and a belt-supporting member, preferably an idler roller, is mounted on a lever for conjointly swinging the supporting member and the belt out of engagement with the drive disk or sheave. A positive, constant-speed drive of the supply and picking rollers and, alternately, a certain disengagement of the drive belt and the drive disk, can be achieved by mounting the belt-supporting idler in a bearingon one arm of a bell crank, whereby the roller, in one position of the bell crank, pulls the drive belt around a substantial arcuate portion of the drive disk and firmly holds the belt against the disk.

In order to standardize the sliver-resolving mechanism while accommodating variations in distance between a roller shaft and a drive shaft, or variations in drive belt length, the belt-supporting idler roller may be mounted on an end of an intermediate lever operable by a principal bell crank mounted on the housing for the resolving device. For positive disposition of the bell crank in roller-driving position, the free bell crank arm has an index pin or detent engageable in a hollow or bore in the housing wall, which detent arm can be released manually from the bore.

When the highspeed needle or picking roller is disengaged from its drive, the supply roller runs so slowly that it need not be disengaged from its drive to avoid danger or hindrance to workmen for some kinds of maintenance. Often, however, maintenance could be performed more effectively if the supply roller also were stopped. For this purpose the supply roller can have a belt drive including a belt shifter to cast the belt off a driven pulley on the supply roller shaft. The pulley, in this instance, has a single flange adjacent to the supply roller so that the belt-engaging rim has an outer free edge over which the belt can be slid from the pulley by the belt shifter. Another sliver supply roller drive arrangement could include a driven gear on the roller shaft, a drive gear and an intermediate idler gear connecting the drive and driven gears. The intermediate gear is mounted on a lever for swinging the gear out of meshing engagement with the adjacent gears to interrupt the supply roller drive.

Either or both the picking roller and the sliver supply roller may be mounted in bearings which have snap connections, the bearing mountings being on one side of the housing. The internal parts offthe resolving device are readily accessible by the housing structure of the present invention which has the supply roller and needle roller bearings and bearing mountings on the same side of the housing as the drive mechanism, so that the opposite housing wall can be quickly removed by release of a manually operable fastening. Closure and fiber guide elements within the housing can be set in place without fasteners, the removable side wall serving as a side supporting surface for such elements.

FIG. 1 is a top perspective of an open end spinning station including a sliver-resolving device in accordance with the present invention, with parts broken away.

FIG. 2 is a detail top perspective of one type of picking roller drive mechanism.

FIG. 3 is a detail top perspective of modified disengageable roller drive structure for the picking and supply rollers.

FIG. 4 is a section through the sliver-resolving device taken on an upright plane through the supply roller axis, viewed from the left of FIG. 3, parts being shown in elevation.

FIG. 5 is a section through the sliver-resolving device taken on a diametral plane of the rollers, viewed from the right of FIG. 1.

FIG. 1 shows a spinning station including a housing 1 for the sliver-resolving device of the present invention and a housing 2 for the spinning turbine, both mounted to a portion 9 of the frame of a multiplestation spinning machine. Fibers from sliver 4 fed to the resolving device are processed by the spinning station to spin a thread 40 which passes through a threadsensing device 20. The sensing device can operate switching mechanism to actuate an electromagnet 33 in response to thread-forming irregularities. Such electromagnet extends an arm connected to a sliver-clamping lever 34 to swing the lever about pivot 36 shown in FIG. 5 until the upper lever end engages a clamping surface on an intake guide member 35, thereby clamping the sliver closely adjacent to the feed passage through the lever 34. Such lever also will press the guide member 35 downward against the force of a compre ssion spring to separate a concave guide member surface from supply roller 3, which concave surface normally cooperates with roller 3 to feed the sliver to needle or picking roller 5. Consequently, the supply of fiber to the resolving mechanism is quickly and positively interrupted. Gther shutoff devices could supplement or be substituted for the sensor 20, such as a master shutoff switch for the entire spinning machine.

When the spinning station is stopped for any reason, the sliver supply and resolving operation should be interrupted immediately; and the mechanism described above will effect such interruption. Such stoppages may be necessitated, for example, by sliver clinging to roller 3 and thereby winding onto the roller, as may occur when an improper fiber material is supplied to the machine, by a break in the thread or reduction in thread tension below spinning requirements, or for general cleaning, inspection and maintenance. After the sliver feed is interrupted, access to the interior of the spinningchamber housing 2, can be obtained by swinging cover 21 outward about its hinge in the usual manner to clean the spinning chamber. The spinning turbine pulley 23 can be separated from a common drive belt 22 by engagement of the roller on lever 24 with belt 22. The lever is raised by manipulation of a pullring 26 at the front of the machine to pull the hidden end of lever 24 downward by cable 25 connected between such lever end and the pullring. A hook 28 on the machine frame member 27 will receive the pullring to hold lever 24 in belt-lifting position. I

The present invention is particularly concerned with the drive mechanism for sliver supply roller 3 and needle or picking roller and with the mechanism for quickly disengaging such roller drive from common drive shafts for actuating simultaneously a number of corresponding resolving device rollers. The highspeed needle or picking roller has a shaft 50 carrying a pulley 51, shown in best in FIGS. 2 and 3. One arc of an endless drive belt 52 is carried by pulley 51. The belt is driven by a drive disk 53 having a substantial peripheral portion normally engaged with an upper stretch portion of belt 52 during the spinning operation. By such a friction belt drive arrangement, a single belt 52 could be assigned to a number of spinning stations, or simply to a single spinning station as illustrated in the drawings. A control member engageable with the belt 52 is movable between a position holding such belt in driving engagement'with disk 53 and pulley 51 and a position in which the belt is disengaged either from drive disk 53 or from the driven pulley 51. In either case driving engagement of the belt with pulley 51 is interrupted. In the form of invention shown in FIG. 3, the movable member is an idler control pulley 55 which carries the arc of endless belt 52 opposite pulley 51. Pulley 55 is mounted in a manner described below for moving the upper belt stretch between the position shown in FIG. 3 engaging a portion of the drive disk periphery, and the position shown in FIG. 2 spaced from disk 53. Shaft 54 extends the entire length of the spinning machine to drive a plurality of disks 53, one of such drive disks being located at each spinning station.

Control pulley 55 can be moved quickly and easily between its two limit positions by the roller-mounting structure shown in FIG. 3. The pulley is mounted on one arm of a lever, shown as bell crank 6. In the position shown in that figure, control pulley 55 is located at the side of disk 53 opposite pulley 51 at an elevation such that its upper periphery is located above the lower periphery of disk 53 so that belt 52 engages a substantial peripheral portion of the drive disk. Pulley 55 also cooperates with disk 53 to form a nip between which belt 52 passes to further assure negligible belt slip. Bell crank 6 is held in the belt-driving position by a tension spring 60 having one end fastened to .the pulleyr'nounting crank arm and its other end fastened on a hook 61 on housing 1 The arcuate extent of engagement of belt 52 with the periphery of disk 53 is determined by the'tensile force characteristics of spring 60.

The other arm of bell crank 6 has a horizontal shoulder 62, so that the upper arm portion 66 is reduced in thickness and thereby spaced further from housing wall 10 than the main body of crank 6. A leaf spring 64 has one end fastened to the upper surface of housing 1, its free end being bent upward to form a grip 65. Such leaf spring has a lateral projection 63 which nonnally engages the right side, as seen in FIG. 3, of the thicker crank arm portion below shoulder 62 when pulley 55 is in disengaging position. When leaf spring 64 is raised by pulling up on grip 65, projection 63 is raised above shoulder 62 so crank arm 66 is swung to the right, as viewed in FIG. 3, by the force of spring 60 past the projection 63 to reengage control pulley 55 and belt 52 with disk 53. To disengage pulley 55 and belt 52 from disk 53, subsequently, crank 6 is again swung to the left, as viewed in FIG. 3, against the force of spring 60, and projection 63' will be slid over shoulder 62 by spring 64 and snap into locking engagement with the opposite side of crank arm 66 to hold the control pulley in the swung position. With the drive thus disengaged, picking or needle roller 5 will coast to a stop. If desired, a positive brake. could be provide to arrest roller 5 more quickly. The housing 1 can then be opened in a manner described below.

FIG. 2 shows a modified lever construction for supporting belt-tensioning control pulley 55. In this instance an intermediate lever 70 is pivoted on the housing-mounted lever 7, pulley 55 being mounted on one arm of the intermediate lever. A compression spring 71 has its opposite ends loosely received in bores, respectively, in a shoulder of the lever 7 and in the end portion of the pulley-mounting arm of lever 70. Such compression spring normally urges the pulley-mounting arm of lever 70 away from pulley 51 to extend belt 52 connecting such pulley and pulley 55. The extent to which such pulley-mounting lever arm can be swung about its pivot by spring'7l is limited by a stop 74 projecting from lever 7. The stop engages the opposite arm of lever 70 at a location which prevents the pulleymounting lever arm from swinging away from the compression spring-engaging shoulder of lever 7' a distance greater than the effective length of compression spring 71. Absent stop 74, the belt-tensioning force of spring 71 could be rendered ineffective by overswing of lever 70.

Lever 7 is pivotally connected to housing 1 and is of generally-bell crank configuration, with the end of the bell crank arm remote from the housing pivotally mounting intermediate lever 70. The other bell crank arm end carries a boss 72 housing a detent receivable in a bore 19 in the housing wall 10. An arm 73-projecting from boss 72 provides a handle for manually swinging lever 7 about its pivot and to engage and disengage the detent from its bore 19. The lower arm of lever 7 will swing downward by gravity into the position shown in FIG. 2 when the detent is released, so that lever 70 and control pulley 55 are swung downward to disengage belt 52 from peripheral contact wtih drive disk 53. When arm 73 is pulled to the right in FIG. 2 to engage the detent in its bore 19, the lever 70 and pulley 55 will be raised sufficiently to hold belt 52 firmly in driving contact with disk 53.

As the upper stretch of belt 52 embraces the arcuate disk periphery, the distance between pulley 55 and pulley 51 will be effectively shortened; and, correspondingly, the roller-mounting arm of lever 70 will be swung toward the pivot of lever 7 to increase the compression in spring 71. The spring force tending to separate control pulley 55 and pulley 51 will press belt 52 firmly against the drive disk to minimize slip between the disk and belt. .A principal advantage of providing two levers 7 and 70 is that lever 7 can be mounted on a sliverresolving housing 1, and such housing and lever need not be modified to permit use of belts 52 of different lengths to vary the spacing between pulley 51 and pulley 55. Such variation may be required to adapt to different spinning machines. Such adaptation 'canbe easily accomplished by varying the dimensions of intermediate lever 70 and selecting different belts 52 and compression springs 71 and providing an easily demountable pivot connection between levers 7 and 70. Such parts are more readily interchangeable and can be modified more inexpensively than the housing 1 and its attachments.

After the picking roller has stopped, the housing 1 can be quickly and easily opened manually by providing a housing wall 11, shown in FIGS. 1 and 4, which can be removed by disconnecting knurled thumbscrews 12 or providing other quick-release fastening means for connecting wall 11 to housing 1. After wall 11 is removed, the internal parts of the sliver-resolving device are readily accessible, as shown in FIG. 5, including the closure elements, the fiber-supply elements, the closing lever 13 for the dirt-removal device 14, the sliverclamping lever 34 and the sliver feed guide member 35. Mounting pin 15 for closure lever 13 and mounting pin 36 for sliver-clamping lever 35 projecting from housing wall fit into complemental bores in the respective fiber guide elements 13 and 35 so that they can be pulled axially out of the housing. Levers 13 and 34, as well as guide member 35, are normally laterally held in operative position by wall 11 which serves as a bearing surface for these members. I

The needle or picking roller 5 can be quickly demounted by a snap connection between the housing and the roller bearing. A suitable connection for this purpose is shown in FIG. 4 for supply roller 3, in which the portion of housing wall 10 encircling bearing84 includes a resilient packing ring 18 having an annular groove for receiving an annular ring 38 of resilient material carried on bearing 84. The ring and groove provide a snap-engageable mounting for the bearing so that a firm pull in the axial direction will release the bearing. In the particular arrangement shown, the pull would be exerted on gear wheel 81 and removal of the bearing would leave an opening of sufficient size for passage of roller 3 therethrough. A similar connection could be provided for the bearing 56 for roller 5. Alternatively, this bearing could be held in place by a setscrew 57, as shown in FIG. 2. In FIG. 3 the bearing 56 is threaded so that it can be screwed into the wall of housing 1.

As mentioned previously, the supply roller 3 operates at such slow speed that the wall 11 could be removed without danger. However, such roller can be stopped completely without stopping the main drive shaft 30 by the arrangement shown in FIG. 1. Pulley 32 mounted on the shaft of roller 3 has only one flange, which flange is located between the belt-engaging pulley rim and housing 1 so that belt 31 can be slid off the pulley axially away from the pulley rim. Removal of the moving belt from the pulley is effected by moving slide bar 16 of a belt shifter so that collar 39 on such bar will push the belt to the left over the free edge of the pulley. Because of the slow speed of drive shaft 30, there is no danger that the released belt will flail uncontrolled, but it will simply drop over the pulley rim onto the machine. When the belt shifter slide bar 16 is in position for normal machine operation, the collar 37 limits movement of the belt away from the flange of pulley 32 and thereby prevents the belt from inadvertently slipping off the pulley.

Another arrangement for separating roller 3 from its drive is shown in FIG. 3. In this instance the roller is driven by a gear train 8 including a drive gear wheel on drive shaft 30, a driven gear wheel 81 on the shaft of roller 3, and a connecting idler gear wheel 82. The

connecting gear meshes with gears 80 and 81 at a loCation above a line connecting the axes of gears 80 and 81 so that gear 82 can be moved upward and thereby lifted from meshing engagement with its cooperating gears. Such idler gear is mounted on a lever 83 for effecting such disengagement. As shown in FIG. 4, lever 83 encircles bearing 84 and is, therefore, pivotable about the axis of roller 3 so that gear 82 moves along an are about such axis.

Other variations of construction, in addition to those shown in the drawings can be substituted without de parting from the invention. For example, as suggested above in connection with the bearing-release construction for rollers 3 and 5, some features can be interchanged or combined. Individual parts can be replaced by equivalent parts which perform substantially the same function. The belt-moving control member 55 could be connected to a rod movable transversely of the direction of movement of belt 52. In place of control pulley 55, belt 52 could be controlled by a pin or rod on a reciprocable fork. The belt 52 could be pressed against drive disk 53 or pulley 51 by resilient 'means carried on a member which is independent of the belt-moving member and extending into the area enclosed by the belt. Instead of the pivotable lever mount for control pulley 55 being a bell crank, such lever could be a single arm; and a lever-moving handle could be attached between the pivot and the roller mount. The belt-moving lever could be actuated manually, as described, or by electromagnetic, pneumatic or hydraulic means which could be switch-actuated. If space permits, linkage could be connected to the lever for operation from a remote location.

The levers 6 and 7 are shown as bell cranks being held in one limit position by a spring and in the other limit position by a detent or other locking device. It would be feasible to eliminate the spring and provide two positions in each of which the lever could be held by detent means, for example. In another variation a spring urges a lever into its opposite limit positions, respectively, the lever having an intermediate unstable position from which the spring tends to move the lever one or the other of the lever limit positions.

It is important that supply roller 3 run evenly to avoid irregular fiber supply to the spinning chamber; but this could be accomplished by other disengageable drive mechanism. For example, instead of the gear train drive 8, the gear wheels 80, 81 and 82 could be replaced by friction wheels. The lever for the intermediate idler wheel could be mounted on the drive shaft 30 instead of on the bearing for the shaft of roller 3.

In addition to the ability to stop picking roller 5 and supply roller 3 to enable housing wall 11 to be opened safely for maintenance .or cleaning or to change the fiber material being spun in the shortest possible time, it is also possible to replace the entire sliver-resolving unit 1. Because the fiber feed channel 29 communicating between the resolving device and the spinning chamber is connected to the cover 21 of housing 2, the mouth of channel 29 can simply rest on the upper surface of housing 1 in alignment with the fiber discharge opening, as shown best in FIG. 5, so that no positive connection between channel 29 and housing 1 is required. Consequently, after rollers 3 and 5 have been disconnected from their respective drives by the mechanism disclosed herein, screws 90, by which housing 1 is mounted on machine frame member 9, can be removed, the housing slid out from the front of the machine and a new housing can be slid in beneath channel 29 and fastened in place by screws 90.

While the invention has been described in connection with an open end spinning machine having a spinning turbine, such a sliver-resolving device could be applied to spinning funnels such as shown in Czechoslovakian patent No. 87,947 or Japanese patent application No. 24,051/63, electrostatic spinning devices such as disclosed in French patent No. 1,442,699 or German patent No. 1,922,876, or spinning chambers in which fluid-entrained fibers are picked up by a freely rotating thread end, as shown in US. Pat. No. 2,911,783.

We claim:

l. A sliver-resolving device for a spinning station of a spinning machine including a housing for a lowspeed sliver-supply roller and a highspeed picking roller, comprising a drive disk, a picking roller pulley for driving the picking roller, a picking roller drive belt engageable with said pulley and with a substantial peripheral portion of said drive disk, a control pulley movable between a first position in which said control pulley effects driving engagement of said belt with said drive disk and a second position in which said control pulley has shifted said belt out of driving engagement with said drive disk, a first pivoted lever having an arm mounting said control pulley, a second pivoted lever carrying said first lever with the first lever pivot spaced from the second lever pivot, and spring means normally urging said control pulley mounting arm to swing away from the pivot of said second lever, and stop means for limiting movement of said control pulley mounting arm away from the pivot of said second lever.

2. The sliver-resolving device defined in claim 1, the spinning machine having a plurality of spinning stations, each station having a drive disk, and a common shaft for conjointly driving the disks of all of the spinning stations.

3. A sliver-resolving device for a spinning station of a spinning machine including a housing for a lowspeed sliver-supply roller and a highspeed picking roller, comprising a drive disk, a picking roller pulley for driving the picking roller, a picking roller drive belt engageable with said pulley and a substantial peripheral portion of said drive disk, a control pulley movable between a first position in which said control pulley effects driving engagement of said belt with said drive disk and a second position in which said control pulley has shifted said belt out of driving engagement with said drive disk, locking means on the housing, lever means pivoted on the housing and including a first lever arm at one side of the lever means pivot for mounting said control pulley and a second lever arm at the side of the lever means pivot remote from said first lever arm, and detent means carried by said second lever arm and engageable with and disengageable from said locking means.

4. The sliver-resolving device defined in claim 3, in which the locking means is a hollow in the housing.

5. A sliver-resolving device for a spinning station of a spinning machine including a housing for a lowspeed sliver-supply roller and a highspeed picking roller, comprising a drive disk, a picking roller pulley for driving the picking roller, a picking roller drive belt engageable with said pulley and with a substantial peripheral portion of said drivedisk, a control pulley movable between a first position in which said control pulley effects driving engagement of said belt with said drive disk and a second position in which said control pulley has shifted said belt out of driving engagement with said drive disk, lever means for mounting said control pulley, disengageable drive means for the sliver-supply roller, said picking roller drive belt and said sliversupply roller drive means being located externally of and at one side of the housing, the housing including a first wall adjacent to said sliver-supply roller drive means and a second housing wall opposite said first housing wall, said first housing wall having a plurality of pin means projecting into the housing, a plurality of fiber-guiding elements contained within the housing, each having a bore engageable with one of said pin means, respectively, said second housing wall limiting movement of each fiber-guiding element away from said first housing wall, and quickly-disengageable mounting means for securing said. second housing wall to the housing.

UNHZED armies PATENT omen QERTIFEQAEE OF @ORREQTEON Patent No. 3 9 807 a 8 Datd April 30 a 1974 Hans Landwehrkamp et a1.

Inventor(s) It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Title page, 'line 73 change name of assignee to "Schubert G Salzer Maschinenfabrik Aktiengesellschaft";

line 56, cancel "Firebel" and insert Friebel Signed and sealed this 15th day of October 1974.

(SEAL) Attest:

C. MARSHALL DANN MCCOY M. GIBSON JR. Atte'sting Officer 7 Commissioner of Patents USCOMM'DC 60376-F'69 U S, GOVERNMENT PRINTING OFFICE: 8 69 93o FORM PO-1050 (10-69) 

1. A sliver-resolving device for a spinning station of a spinning machine including a housing for a lowspeed sliver-supply roller and a highspeed picking roller, comprising a drive disk, a picking roller pulley for driving the picking roller, a picking roller drive belt engageable with said pulley and with a substantial peripheral portion of said drive disk, a control pulley movable between a first position in which said control pulley effects driving engagement of said belt with said drive disk and a second position in which said control pulley has shifted said belt out of driving engagement with said drive disk, a first pivoted lever having an arm mounting said control pulley, a second pivoted lever carrying said first lever with the first lever pivot spaced from the second lever pivot, and spring means normally urging said control pulley mounting arm to swing away from the pivot of said second lever, and stop means for limiting movement of said control pulley mounting arm away from the pivot of said second lever.
 2. The sliver-resolving device defined in claim 1, the spinning machine having a plurality of spinning stations, each station having a drive disk, and a common shaft for conjointly driving the disks of all of the spinning stations.
 3. A sliver-resolving device for a spinning station of a spinning machine including a housing for a lowspeed sliver-supply roller and a highspeed picking roller, comprising a drive disk, a picking roller pulley for driving the picking roller, a picking roller drive belt engageable with said pulley and a substantial peripheral portion of said drive disk, a control pulley movable between a first position in which said control pulley effects driving engagement of said belt with said drive disk and a second position in which said control pulley has shifted said belt out of driving engagement with said drive disk, locking means on the housing, lever means pivoted on the housing and including a first lever arm at one side of the lever means pivot for mounting said control pulley and a second lever arm at the side of the lever means pivot remote from said first lever arm, and detent means carried by said second lever arm and engageable with and disengageable from said locking means.
 4. The sliver-resolving device defined in claim 3, in which the locking means is a hollow in the housing.
 5. A sliver-resolving device for a spinning station of a spinning machine including a housing for a lowspeed sliver-supply roller and a highspeed picking roller, comprising a drive disk, a picking roller pulley for driving the picking roller, a picking roller drive belt engageable with said pulley and with a substantial peripheral portion of said drive disk, a control pulley movable between a first position in which said control pulley effects driving engagement of said belt with said drive disk and a second position in which said control pulley has shifted said belt out of driving engagement with said drive disk, lever means for mounting said control pulLey, disengageable drive means for the sliver-supply roller, said picking roller drive belt and said sliver-supply roller drive means being located externally of and at one side of the housing, the housing including a first wall adjacent to said sliver-supply roller drive means and a second housing wall opposite said first housing wall, said first housing wall having a plurality of pin means projecting into the housing, a plurality of fiber-guiding elements contained within the housing, each having a bore engageable with one of said pin means, respectively, said second housing wall limiting movement of each fiber-guiding element away from said first housing wall, and quickly-disengageable mounting means for securing said second housing wall to the housing. 